Botan::Filter Class Reference

#include <filter.h>

Inheritance diagram for Botan::Filter:

Public Member Functions
virtual bool	attachable ()
virtual void	end_msg ()
virtual std::string	name () const =0
virtual void	start_msg ()
virtual void	write (const uint8_t input[], size_t length)=0
virtual	~Filter ()=default

Protected Member Functions
	Filter ()
	Filter (const Filter &)=delete
Filter &	operator= (const Filter &)=delete
virtual void	send (const uint8_t in[], size_t length)
void	send (uint8_t in)
template<typename Alloc >
void	send (const std::vector< uint8_t, Alloc > &in)
template<typename Alloc >
void	send (const std::vector< uint8_t, Alloc > &in, size_t length)

Friends
class	Fanout_Filter
class	Pipe

Detailed Description

This class represents general abstract filter objects.

Definition at line 21 of file filter.h.

Constructor & Destructor Documentation

~Filter()

virtual Botan::Filter::~Filter ( )

virtualdefault

Filter() [1/2]

Botan::Filter::Filter ( )

protected

Definition at line 16 of file filter.cpp.

   {
   m_next.resize(1);
   m_port_num = 0;
   m_filter_owns = 0;
   m_owned = false;
   }

Filter() [2/2]

Botan::Filter::Filter ( const Filter &  )

protecteddelete

Member Function Documentation

attachable()

virtual bool Botan::Filter::attachable ( )

inlinevirtual

Check whether this filter is an attachable filter.

Returns

true if this filter is attachable, false otherwise

Reimplemented in Botan::SecureQueue, and Botan::DataSink.

Definition at line 52 of file filter.h.

{ return true; }

end_msg()

virtual void Botan::Filter::end_msg ( )

inlinevirtual

Notify that the current message is finished; flush buffers and do end-of-message processing (if any).

Reimplemented in Botan::Base64_Decoder, Botan::Hex_Decoder, Botan::DataSink_Stream, Botan::Base64_Encoder, and Botan::Hex_Encoder.

Definition at line 46 of file filter.h.

Referenced by send().

{ /* default empty */ }

name()

virtual std::string Botan::Filter::name ( ) const

pure virtual

Returns

descriptive name for this filter

Implemented in Botan::Fork, Botan::Hex_Decoder, Botan::Base64_Decoder, Botan::DataSink_Stream, Botan::Chain, Botan::Cipher_Mode_Filter, Botan::BitBucket, Botan::Hex_Encoder, Botan::SecureQueue, and Botan::Base64_Encoder.

Referenced by Botan::Keyed_Filter::set_iv().

operator=()

Filter& Botan::Filter::operator= ( const Filter &  )

protecteddelete

send() [1/4]

void Botan::Filter::send ( const uint8_t  in[], size_t  length  )

protectedvirtual

Parameters

in	some input for the filter
length	the length of in

Definition at line 27 of file filter.cpp.

References end_msg(), start_msg(), and write().

Referenced by Botan::Base64_Encoder::Base64_Encoder(), Botan::Hex_Encoder::end_msg(), Botan::Base64_Encoder::end_msg(), Botan::Hex_Decoder::end_msg(), Botan::Base64_Decoder::end_msg(), Botan::Hex_Encoder::Hex_Encoder(), Botan::Cipher_Mode_Filter::valid_iv_length(), Botan::Hex_Decoder::write(), and Botan::Base64_Decoder::write().

   {
   if(!length)
      return;

   bool nothing_attached = true;
   for(size_t j = 0; j != total_ports(); ++j)
      if(m_next[j])
         {
         if(m_write_queue.size())
            m_next[j]->write(m_write_queue.data(), m_write_queue.size());
         m_next[j]->write(input, length);
         nothing_attached = false;
         }

   if(nothing_attached)
      m_write_queue += std::make_pair(input, length);
   else
      m_write_queue.clear();
   }

send() [2/4]

void Botan::Filter::send ( uint8_t  in )

inlineprotected

Parameters

in	some input for the filter

Definition at line 65 of file filter.h.

References send().

Referenced by send().

{ send(&in, 1); }

send() [3/4]

template<typename Alloc >

void Botan::Filter::send ( const std::vector< uint8_t, Alloc > &  in )

inlineprotected

Parameters

in	some input for the filter

Definition at line 71 of file filter.h.

         {
         send(in.data(), in.size());
         }

send() [4/4]

template<typename Alloc >

void Botan::Filter::send ( const std::vector< uint8_t, Alloc > &  in, size_t  length  )

inlineprotected

Parameters

in	some input for the filter
length	the number of bytes of in to send

Definition at line 81 of file filter.h.

References BOTAN_ASSERT_NOMSG.

         {
         BOTAN_ASSERT_NOMSG(length <= in.size());
         send(in.data(), length);
         }

start_msg()

virtual void Botan::Filter::start_msg ( )

inlinevirtual

Start a new message. Must be closed by end_msg() before another message can be started.

Definition at line 40 of file filter.h.

Referenced by send().

{ /* default empty */ }

write()

virtual void Botan::Filter::write ( const uint8_t  input[], size_t  length  )

pure virtual

Write a portion of a message to this filter.

Parameters

input	the input as a byte array
length	the length of the byte array input

Implemented in Botan::Fork, Botan::Base64_Decoder, Botan::Hex_Decoder, Botan::DataSink_Stream, Botan::Chain, Botan::Hex_Encoder, Botan::Base64_Encoder, Botan::BitBucket, and Botan::SecureQueue.

Referenced by send(), and Botan::Pipe::write().

Friends And Related Function Documentation

Fanout_Filter

friend class Fanout_Filter

friend

Definition at line 107 of file filter.h.

Pipe

friend class Pipe

friend

Definition at line 106 of file filter.h.

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The documentation for this class was generated from the following files:

• src/lib/filters/filter.h
• src/lib/filters/filter.cpp